Compound instrument.



G. F. HALL.

COMPOUND INSTRUMENT.

APPLIUATION FILED AUG. 21, 1912.

1,068, 124. Patented July 22, 1913.

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G. P. HALL. COMPOUND INSTRUMENT.

APPLICATION FILED AUG. 21, 1912.

Patented July 22, 1913.

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WITNESSES:31 30 36 41 4o 39 a INVENTOR LE EQI E F. H5111 COLUMBIAPLANOGHAPH CD..\VASHINGTON GEORGE l5. HALL, OF NEW'ARK, NEW JER$EY,ASSIGNOR OF ONE-HALF T0 GEORGE E. BILL, OF EAST ORANGE, NEW JERSEY.

COMPOUND INSTRUMENT.

Specification of Letters Patent.

Patented July 22, 1913.

Application filed August 21, 1919 Serial No. 716,16

To all whom it may concern lie it known that l, GEORGE F. l'lALL, acitizen of the United. States, residing at Newark, in the county ofEssex and State of New Jersey, have invented certain new and usefulln'iprovements in Compound lnstruments; and l do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to characters of reference marked thereon, which form a part of thisspecification.

The present invention relates, generally, to improvements in compoundinstruments, and the invention refers, more particularly, to a combinedl -square, protractor, bevel and triangle, arranged so as to be capableof adjustment in different angles.

The invention has for its primary object to provide a simple and easilymanufactured device of the character above forth, the same being capableof use for many purposes, such a square and bevel, a draftsmans triangleand section lining instru ment, and many like purposes.

Another object of the present invention is to provide in a device of thecharacter describ d, means whereby the same can be used in combinationwith the ordinary T-square, an example of such use being the applicationof the device to a i -square for producing a guide for section lining atangles not embra :ed by the ordinary forms of triangles.

A. still furth r object of this invention is to provide in a device ofthe character described, a novel and positive means whicl'i is quicklyand easily operated to loci; in any desired adji'isted relation to eachother the movable or adjustable parts of the device.

()ther objects of the present invention, and other uses to which it maybe adapted, will be readily understood from an inspection of theaccomymnying drawings, as well as from the following detaileddescription of the said invention.

The invention consis s, primarily, in the novel and simple constructionof compound instrument hereinafter set forth, and the inventionconsists, furthermore, in the novel arrangements and combinations of thevarious parts, as well as in the details of the construction thereof,all of which will be hereinafter more fully described in the followingspeclfication and then finally embodied in the clauses of the claimwhich are appended to and which form an essential part of thisspecification.

The invention is clearly illustrated in the accompanying drawings, inwhich 2- Figure 1 is a plan view of the novel compound instrument asapplied in use with an ordinary 'l -sqnare. Fig. 2 is asin'iilar planview, illustrating by dotted representation the adj ustlnent of themovable or adjustable part of-the device. Fig. 3 is a cetail transversesection of the movable or adjustable head of the device, said view beingdrawn on an enlarged scale. Fig. -l is a detail bot tom view of aportion of the instrument illustrating the pivotal connection of saidmovable or adjustable head with the main body of the device, and showingthe rear face of the locking means. Fig. 5 a detail longitudinalsect-ion, enlarged, of the locking means for securing the movable oradjustable head in a desired adjusted relation to the main body of thedevice. llig. (3 is a plan view of a slightly modified form of lockingmeans; and Fig. 7 is a loi'igitudinal section of the same.

Similar characters of reference are em ployed in all of the abovedescribed views, to indicate corresponding parts.

Referring now to the several figures of the said drawings, thereferencecharacter 1 indicates the complete compound instrument madeaccording to and embodying the principles of the present invention, thesame comprising a main body-portion 2 provided with a straight edge 3,and having a suit-- able measuring scale a located along said straightedge 3, said scale comprising any desirable spacodivisions orgraiduat-ions. Extending from one end of said main bodyportion 2, andpreferably at an angle of forty-five degrees therefrom, is an arm 5.Pivotally-connected, by means of a pivotstud 6, with the free end ofsaid arm 5 is an adjustable head, coin n'ising a pair of platemembe 7and 7, which are superimposed one above the other but spaced slightlyapart from each other, by means of an interl'nediate block or plate 8 towhich said platc-members T and T are riveted or otherwise secured. Saidintermediate block or plate 8 is of considerably less length than thelengths of said plate-members, so that the intervening space between thelatter, adjacent to their ends, is free or open thus permitting the saidplate-members 7 and 7 5 t straddle the said arm at one end and the mainbody-portion 2 at the other. The free ends of said plate-members 7 and 7which overlap, said main body-portion 2, are preferably beveled or cutso as to form a 1 finder or pointer-member 9, which serves, inconnection therewith a proper protractor or scale of degrees 10 arrangedupon the face of said main body portion 2, to indicate the adjustment ofsaid head in desired angles with relation to said main body-portion 2and its arm 5.

The upper plate-member 7 is provided, at ,its inner longitudinal edge,with an upwardly projecting longitudinal rib 11, the

same extending at right angles to said platemember 7; and, in likemanner, the lower plate-member 7 is also provided, at both its inner andouter longitudinal edges,'with upwardly projecting longitudinal ribs 12and 13 respectively, the same extending at right angles to saidplate-member 7. The respective ribs 11 and 12 serve to position theinstrument on the work, when the same is used, for example as a bevel,T-square or the like, and the rib 13 serves to position the instrumentagainst the edge of a T-square, as A in Fig. 1, when using saidinstrument in such connection. Furthermore, the ribs 12 and 13projecting from the surface of said plate-member 7, and being of thesame height, serve to level said instrument, and hold the same above thedrawing paper, or slightly spaced away from the paper, so that the bodyof the instrument does not cont-act with the paper, a feature of greatadvantage when using the instrument as an aid in drafting section liningupon a drawing, since the work can be covered without danger ofsmutting, rubbing or blotting, as

will be readily understood.

In order to lock said head in any desired adjusted position withrelation to said main body-portion 2 and said arm 5, the following novelmeans is provided :The pivotstud 6 is provided at one end with aheadpiece let which is cupped out or concaved on its under side, as at15, thus providing at the marginal edges of said head-piece a sharpgripping edge 16 which contacts With the surface of said plate-member 7Said pivotstud 6 is provided, adjacent to its free end with exteriorscrew-threads 17. Connected with said screw-threads 17 of saidpivot-stud 6 by means of its interiorly 6O screw-threaded perforation 18is a lock-nut member 19, the same being cupped out or concaved on itsunder side, as at 20, thus providing a sharp gripping edge 21 whichcontacts with the surface of said plate-memher 7. Extending outwardlyfrom said lock-nut member 19 is a lever-arm 22 provided at its free endwith an upturned finger-piece 23 whereby said arm 22 may be manipulatedto tighten or loosen said lock nutmember. To adjust said head, saidlever-arm 22 is moved in one direction whereby said lock-nut member 19is turned upon said screwthread 17 of said pivotstud 6 to loosen thesame. The said head is then swung upon said pivot-stud into the desiredposition, whereupon said lever-arm is moved in an opposite direction,tightening said nut-lock member 19 and causing the respective separatedplate-members 7 and 7 to be engaged by the gripping edges 16 and 21 ofthe respective parts 1d and 19, thereby forcing into frictional orbinding engagement with the opposite sides of said arm 5, the respectiveplate-members 7 and 7, the said gripping edges 16 and 21 by biting thesurfaces of the respective platemembers 7 and 7 preventing anyaccidental disarrangement of the said locking means when thus broughtinto locking or holding ngag ment.

As it may be desired to remove said head from its connection with saidmain bodyportion 2 and its arm 5, thesaid head-piece of said pivot-stud6 is provided with a pair of suitably disposed spanner-wrench receivingholes or depressions 24:, by means of which said. pivot-stud may beremoved from its connection with said lock-nut member 19, and thus fromits pivot-providing relation to said head and arm The said mainbody-portion 2 is further provided with diamond shaped perforations 25,the same being located opposite the main divisional points of thegraduated scale 1. These perforations serve as a means for strikingarcs, circles or the like, since by inserting a sharp instrument, suchas a brad-awl, in one perforation and a pencil or marking instrument inanother, the latter may be caused to strike the desired are or circle.The diamond-shapedperforation is provided since it provides a wedge-likeedge or means for holding the instrument, no matter in which directionthe movement of striking the are or circle takes place, thus firmlyholding said instrument and insuring a mathematically correct are orcircle and an evenly described line indicating the same, free from wavesor irregularities.

Referring now more particularly to Figs. 6 and 7 of the accompanyingdrawings, there is illustrated therein a slightly modified form oflocking means for securing the head of the instrument in desiredadjusted relation to the main body-portion. In the said Figs. 6 and 7,the main body-portion is indicated by the reference-character 26, thearm connected therewith by the reference-character 27, and therespective platemembers forming the adjustable head by thereference-characters 28 and 28, the general construction and relatedconnection of said thus referred to parts being the same as hereinabovedescribed in connection with the main or preferred construction of thenovel instrument comprisingthis invention. Said head is pivotallyconnected with said arm 27 by means of a pivot-stud 29 provided with ahead-piece 30 the under surface 31 of which is suitably inclined. Theshank of said pivot-stud 29 is provided with suitable screw-threads 32whereby a nutpiece 33 is connected therewith, said not piece beingcupped out or concaved on its under side, as at 84:, thus providing atthe marginal edges of said nut-piece a sharp gripping edge 35 whichcontacts with the surface of said plateanember 2S. Slidably arrangedupon the surface of said platemember 28 is a wedge-block or lock-piece36, the same being provided with a slotted end or cut out portion 87adapted to straddle said pivot-stud shank and thus permit saidwedge-block or locl -piece to be introduced between said head-piece 30of said pivot-stud 29 and said plateanember 2S. Pivotally mounted inconnection with the head formed by said plate-members 28 and 28 by meansof its journal-studs 38 is a rotatable member 39 provided with anoutwardly projecting arm 4E0. Pivotally connected with the free end ofsaid arm 40 and connected in like manner at its opposite end with saidwedge-block or lock-piece 36 is a connecting link-member ll. Extendingfrom said rotatable-member 89, in substantially an opposite direction tothat of the arm 40, is a lever-arm 42 provided at its free end with aturned-up finger-piece 4.3 for manipulating the same. As will be clearlyunderstood from an inspection of Figs. 6 and 7 of the drawings, whensaid rotatable member 89 is turned in a proper direction by thelever-arm 42, it tends to straighten the toggle formed by the arm 4-0and its connecting link-member 41, and thereby forces forward saidwedge-block or lock'piece 36 which has the tendency to exert a pull uponsaid pivot-stud 29, binding in rigidly held or locked engagement saidnut-piece 33 and plate-member 28 and said wedge-block or lock-piece 36and platemember 28 with the free end of said arm 27, thus firmly lockingthe head in adjusted relation to said main body-portion 26.

It will be clearly apparent, that the compound instrument abovedescribed is readily and quickly adjustable, and securely maintained inits adjusted positions, and that the same is readily adapted to theperformance of many functions and operations both in building andconstruction work, as Well as in drafting and similar work.

I am aware that changes may be made in the various arrangements andcombinations of the several parts without departing from the scope of mypresent invention. Hence, I do not limit my invention to the exactarrangei'nents and combinations of the parts as herein described andillustrated in the accompanying drawings, nor do ll confine myself tothe exact details of the construction of the said parts.

I claim 1. A compound instrument connprising a main bodyportion providedwith an angularly extending arm, an adjustable head pivotally connectedwith said arm and having its free end straddling said main bodyportion,ribs projecting in opposite direc tions from the inner niarginal'edgesof said head, and a rib projecting from the outer marginal edge of theunder side of said head, said last-mentioned. rib serving to positionsaid instrument for use in connection with a T-square, substantially asand for the purposes set forth.

2. A compound instrument comprising main body-portion provided with anangularly extending arm, an adjustable head pivotally connected withsaid arm and having its free end straddling said main bodyportion, ribsprojecting in opposite directions from the inner marginal edges of saidhead, and a rib jn'ojecting from the outer marginal edge of the underside of said head, said last-mentioned rib serving to position saidinstrun'ient for use in connection with a T-square, and locking meansfor securing said head in desired adjusted rela tion to said mainbody-portion and its angularly extending arm, substantially as and forthe purposes set forth.

3. A compound instrument comprising a main body-portion provided with anangularly extending arm forn'led integral with said main b j dy-portionat the one end thereof, and a head pivotally connected at one end withsaid arm, said head comprising a pair of plate-members registered onewith the other, an intermediate plate for securing said plate-1neinbersin spaced-apart relation to each other to provide intervei'iing spacesbetween the ends of said plate-members so that one end of the latterwill straddle said main body-portion in movable relation thereto and theother end will straddle said angularly extending arm in pivoted relationthereto, an outwardly extending guide-rib connected with the innermarginal or go of the upper of said plate-members, an outwardlyextending guide-rib connected with the inner marginal edge of the lowerof said platemembers, and an outwardly extending guide-rib connectedwith the outer marginal edge of said lower platemember, saidlast-mentioned guide-rib serving to position said instrument for use inconnection with a 'l'stmare, substantially as and for the purposes setforth.

4. A compound instrument comprising a main body-portion provided with anangularly extending arm formed integral with said main body-portion atthe one end thereof, and a head pivotally connected at its one end withsaid arm, said head comprising a pair of plate-members superimposed andalined one with the other, an intermediate plate for securing saidplate-members in spaced-apart relation to each other to provide spacesbetween the ends of said plate-members so that one end of the head willstraddle said main body-portion in movable relation thereto and theother end will straddle said angularly extending arm in pivoted relationthereto, an outwardly extending guiderib connected to and alined withthe inner marginal edge of the upper of said plate-members, an outwardlyextending guide-rib connected with the inner marginal edge of the lowerof said plate-members, an outwardly extending guide-rib connected withthe outer marginal edge of said lower plate-member, said last-mentionedguide-rib serving to position said instrument for use in connection witha T-square, and locking means for securing said head in desired adjustedrelation to said main bodyportion and its angularly extending arm,substantially as and for the purposes set forth.

5. A compound instrument comprising a main bodyportion provided with anangularly extending arm formed integral with said main body-portion atthe one end thereof, and a head pivotally connected at its one end withsaid arm, said head comprising a pair of platemembers registered onewith the other, an intermediate plate for securing said plate-members inspaced-apart relation to each other to provide intervening spacesbetween the ends of said plate-1nembers so that one end of the latterwill straddle said main body-portion in movable relation thereto and theother end will straddle said angularly extending arm in pivoted relationthereto, an outwardly extending guide-rib connected with the innermarginal edge of the upper of said plate-members, an outwardly extendingguide-rib connected with the inner marginal edge of the lower of saidplate-members, an outwardly extending guide rib connected with the outermarginal edge of said lower plate-member, said lastmentioned guide-ribserving to position said instrument for use in connection with a T-square, and locking means for securing said head in desired adjustedrelation to said main body-portion and its angularly extending arm,comprising a screw-threaded pivotstud, a head-piece connected with saidpivotstud, said head-piece being cupped out on its under side to providea sharp marginal grip ping edge engaging one of said plate-members, anut-piece provided with an interiorly screw-threaded perforation adaptedto receive said screw-threaded pivot-stud, said nut-piece being cuppedout on its under side to provide a sharp marginal gripping edge engagingthe other or opposite of said platemembers, and a lever-arm connectedwith said nut-piece for tightening or loosening the same to draw theends of said respective plate-members into rigid frictional holdingengagement with said angularly extending arm, substantially as and forthe purposes set forth.

6. A compound instrument comprising a main body-portion provided with anangularly extending arm formed integral with said main body-portion atthe one end thereof, and a head pivotally connected at its one end withsaid arm, said head comprising a pair of plate-members superimposed andalined one with the other, an intermediate plate for securing saidplate-members in spaced-apart relation to each other to provideintervening spaces between the ends of said plate-members so that oneend of the latter will straddle said main body-portion in movablerelation thereto and the other end will straddle said angularlyextending arm in pivoted relation thereto, an outwardly extendingguide-rib connected with the inner marginal edge of the upper of saidplatemembers, an outwardly extending guide-rib connected with the innermarginal edge of the lower of said plate-members, an outwardly extendingguide rib connected with an outer marginal edge of said lowerplatemember, said last-mentioned guide-rib serving to position saidinstrument for use in connection with a T-square, and means for forcingthe ends of said respective platemembers into rigid frictional holdingengagement with said angularly extending arm to secure said head indesired adjusted relation to said main body-portion, substantially asand for the purposes set forth.

7 A compound instrument comprising a main body provided with anangularly extending arm, an adjustable head provided with one endadapted to straddle said arm in pivoted relation therewith and anopposite end adapted to straddle said main bodyportion in slidablerelation therewith, and means for forcing the first-mentioned straddlingend of said head in rigid frictional holding engagement with saidangularly extending arm to secure said head in desired adjusted relationto said main body-portion, comprising a screw-threaded pivot-stud, ahead-piece connected with said pivot-stud, said head-piece being cuppedout on its under side to provide a sharp marginal gripping edge engagingone side of said straddling end of said head, a nut-piece provided withan interiorly screw-threaded perforation adapted to receive saidscrew-threaded pivotstud, said nut-piece being cupped out on its underside to provide a sharp marginal set forth above I have hereunto set myhand gmppmg edge engaglng the opposlte slde of thls 20th day of August1912.

eaid straddling end. of said head, and a lever GEORGE F. HALL. armconnected with said nut-piece for ma- \Nitnesses: is nipulating thesame. FREDK. C. FRAENTZEL,

In testimony, that I claim the invention FRED'K. H. W. FRAENTZEL.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

